Fogatti FDG-CS120S
Fogatti FDG-CS120S is in the DOE listing as of Oct 26, 2026.
It has a certified UEF of 0.82–0.83 and a certified flow of 2.9–3.3 gal/min at a 67°F rise.
- Gas tankless water heater
- 2 listed models
Not listed as ENERGY STAR certified on Oct 26, 2026.
Certified figures
- Flow at a 67°F rise
- 2.9–3.3gallons per minute
- UEF
- 0.82–0.83Uniform energy factor
The 2 listed models differ. A range runs from the lowest figure to the highest.
Your fixtures at once
Change your hour and flowFlow where you live
The heater gives less flow when colder incoming water needs a bigger rise.
- Cold water
- Cold water must be at least 10°F colder than the hot water setting.
- Flow estimate
- The estimate uses the lowest certified flow among the listed models. It is about 2.8 gal/min at a 70°F rise.
Flow limits
- The estimate excludes the flow needed to turn the heater on, heat lost in pipes, and installation.
- Cold water from a well or long pipe run can differ from the temperature you enter.
- Without a stated flow limit, estimates for warmer water may exceed the heater’s actual flow.
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| FDG-CS120SAG-LP | 0.83 | 3.3 | 85% | Medium |
| FDG-CS120SAG-NG | 0.82 | 2.9 | 82% | Medium |
UEF is the uniform energy factor. A dash means the model has no such figure.
Its flow at a 67°F rise is 2.9 to 3.3 gallons per minute, by model number. The median flow among gas tankless models is 4.8 gallons per minute. Among 487 gas tankless models, 451 give more flow at a 67°F rise.
As of Oct 26, 2026, it was not listed as ENERGY STAR certified. Its listed models turn 82 to 83% of the energy used into hot water (UEF 0.82 to 0.83). Its test simulated a day of medium hot water use (its draw pattern). Its UEF is lower than that of 26 of the 77 gas tankless models with its draw pattern. For its type and draw pattern, the UEF runs from 0.81 to 0.97.
Its 2 model numbers are FDG-CS120SAG-LP and FDG-CS120SAG-NG. Its test figures match those of 2 other basic models. Of those, one or more are under the Mizudo and Westinghouse brands.
It may qualify for one rebate program if it meets their other terms.
Also listed as
They carry every figure in the table above.
Rebates
| Program | State | Status | Program page |
|---|---|---|---|
| SoCalGas High-Efficiency or ENERGY STAR Certified Natural Gas Tankless Water Heaters rebate | CA | May qualify if it meets the other terms | Its own page |
Programs change their terms. Check the program's own page before you buy.
- Every Fogatti basic model
- Every gas tankless water heater certified below 4.0 gallons per minute
- Every gas tankless water heater
- The most-searched gas tankless models side by side
Not covered
- Advertised figures. We have none on file for this model.